$('#item_form').html("<%= escape_javascript(render  :partial => 'orders/order_items/new.html', :locals => { :order_item => @order_item})%>");
$('#items_title').html('<%= raw  escape_javascript "所有预订项 #{link_to '新增', new_order_item_order_url(@order_item.order), :remote => true, :method => :get, :title => '增加预订项', :class => 'crud new'}" %>');
$('#item_form').show('low', function(){
  $(window).scrollTop($('#item_form').offset().top);  
});